Variable reflectivity wall units, wall assemblies and intelligent building external wall system

Abstract

The invention provides variable reflectivity wall units, wall assemblies containing the wall units, and an intelligent building external wall system composed of the wall assemblies. Each variable reflectivity wall unit comprises a transflective layer and a reflective layer, wherein each transflective layer is used as an outer layer of each wall unit, and each transflective layer partially reflectsand partially transmits ambient light irradiated each transflective layer; each reflective layer is arranged opposite to each transflective layer, and each reflective layer comprises an electrochromic reflective layer, a liquid crystal electrode layer and an underlayer base plate which are sequentially arranged from outside to inside; each transflective layer and each reflective layer are connected by a sealing device to form a first closed gap with a specified width; each first closed gap is provided with a liquid crystal layer; each electrochromic reflective lay has variable reflectivity under the action of an external control voltage; and each liquid crystal layer has a variable refractive index under the control of each liquid crystal electrode layer. By using the variable reflectivity wall units, the wall assemblies and the intelligent building external wall system, an external wall of a building can be kept beautiful, and light pollution caused by light reflection is reduced, and visual damage and potential safety hazards caused by dazzling are prevented.

Description

technical field [0001] The invention relates to building exterior walls and optical devices, in particular to a wall unit with variable reflectivity, a wall assembly and an intelligent building exterior wall system. Background technique [0002] At present, the exterior facades of many high-rise buildings are decorated with glass materials, and for the sake of aesthetics, many glass exterior walls are constructed of high-reflectivity mirror materials. As a result, under the scorching sun, the strong light reflected by the shiny glass wall will have a serious impact on pedestrians and car drivers outside the building. The dazzling reflection will not only damage the visual organs, but also bring inconvenience to travel Affect driving safety. For high-rise skyscrapers, dazzling reflections can even affect the flight safety of aircraft. Bailiang pollution has become a new unnatural hazard in the city. [0003] In recent years, electrochromic glass has begun to be used in sma...

AI Technical Summary

Problems solved by technology

However, for the environment outside the wall, the increased reflection of the building will worsen the already strong glare reflection in summer, resulting in serious light pollution

At the same time, the light absorption increased by the electrochromic glass will also be converted into heat energy, which will eventually be transmitted to the building body. This part of the heat will eventually become a burden on the air conditioning system

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